Komatsu 4D98 Series Shop Manual page 88

7'. Fuel Injection System/Governor
@
Remove the tappet.
(Point 8)
@J
Remove the plunger, spring and spring retainer, control sleeve and pinion.
@ Remove the lock plate, and remove the delivery valve, holder and spring,
@ Remove the plunger & barrel.
@ Remove the control rack from the pump housing.
- [NOTICE]
Tappets, shims, springs, spring retainer, plunger 81 barrel, delivery valves, springs
and delivery valve holders shall be grouped for each cylinder to enable mounting at
original positions unless abnormalities are found.
(4) Assembly procedure
Reverse the disassembly procedure.
(5) Servicing points
Point 1
Disassemble:
l
Remove the fuel injection pump drive
gear and idle gear after putting a match
mark.
Reassemble:
l
Assemble them by aligning the match
marks.
Pump drive
gear nut: T = 83.3-93.1 Nm
(8.5-9.5kgf-m)
j
Gear
Point 2
Disassemble:
l
Governor cover removal (See 7.5( 1) governor components.)
Because the link is connected to the control rack and the starting spring is connected to
spring eye, disconnect the link connection by shifting the governor cover to the left (or right)
after pushing the link leaf spring down with a screwdriver and disconnect the starting spring
from the spring eye with long-nosed pliers before separating the governor cover from the
governor housing.
-[NOTICE]
When removing the governor
cover, carefully operate so as not
to bend the governor cover to ei-
ther side from the governor hous-
ing. If the governor cover is bent
while the link is connected, the link
is bent to increase the sliding resis-
tance of the control rack upon
completion of the governor assem-
bly, resulting in stiff governor
movement.
Reassemble:
l
Coat sealant (code No. 977770-01212) on the mating faces of the governor cover and gover-
nor housing.
I
Screwdriver
A!/
I
Governor cover
7-3